{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["cause effect", "component whole", "product producer", "message topic"], "input": "when a watch of nightingales is at the height of breeding season , the males serenade their prospective brides with one of the most glorious and celebrated bird songs there is ."}
{"cause effect": [], "component whole": [], "product producer": [], "message topic": []}